illegal operation?!

Hey guys!I need some help urgent please !! I wrote this big delphi program and compiled it and then added it to a Install creator and a Install Wizzard. Now on the computer that the program was created I install it and it works. But on all the other computers I get the " This program has performed an illegal operation" error when opening the application and I don't know why. I installed the database files in ODBC and everything but it won't work. Please guys help me here for this is very very important!